sure who makes up these rules. In a room full of 50 Attorneys General (all holding the same title for their state), rightly or wrongly, you will get corrected by the legal community for saying Attorney Generals. I would like to know who makes these grammatical rules and if they are accepted by all grammarians. Citation here, Baron?
I think it winds up being more of a usage issue and less of a strict grammatical one and best left to the pedants.